I cannot get the shift into park or the lower ranges every so often. Thanks!

should I be looking at fuel pressure? pump? any other modules?

brakes apply when turbo fan comes on, going uphill, engine hot. ok going downhill.

After driving 15 hours air conditioning went out then smelled like burning then a loud noise like metal on metal sound turned off then restarted. Let cool down but will not start again is the fuel pump in the gas Tank?? Could the timming belt worn out ?? any ideas?